1
|
Zhang X, Peng C, Jiang J. pH-Controllable Redox Responsive Amphiphilic Viologens for Switchable Emulsions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401651. [PMID: 38660702 DOI: 10.1002/smll.202401651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 04/12/2024] [Indexed: 04/26/2024]
Abstract
A pH and redox dual responsive amphiphilic viologen is synthesized, which can be reversibly transformed among the zwitterionic (SVa), monovalent anionic (SV+), and divalent anionic (SVH2+) forms upon pH variation, exhibiting pH-controllable redox responsive properties. Switchable Pickering emulsions with different droplet size and viscosity are prepared by the mixture of hydrophilic silica nanoparticles and the viologens (SV+ or SVH2+) at acidic conditions, while such combination yielded an oil-in-dispersion emulsion at neutral pH value. Not only can rapid reversible demulsification/stabilization of the Pickering emulsions be achieved by redox reactions, but the rate of redox-demulsification can also be controlled by pH trigger. The dual-responsive amphiphilic viologens have potential applications in developing intelligent colloid materials and molecular logic systems.
Collapse
Affiliation(s)
- Xinyue Zhang
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| | - Chifang Peng
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| | - Jianzhong Jiang
- The Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical & Material Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China
| |
Collapse
|
2
|
Suating P, Ewe MB, Kimberly LB, Arman HD, Wherritt DJ, Urbach AR. Peptide recognition by a synthetic receptor at subnanomolar concentrations. Chem Sci 2024; 15:5133-5142. [PMID: 38577360 PMCID: PMC10988627 DOI: 10.1039/d4sc01122h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 03/07/2024] [Indexed: 04/06/2024] Open
Abstract
This paper describes the discovery and characterization of a dipeptide sequence, Lys-Phe, that binds to the synthetic receptor cucurbit[8]uril (Q8) in neutral aqueous solution with subnanomolar affinity when located at the N-terminus. The thermodynamic and structural basis for the binding of Q8 to a series of four pentapeptides was characterized by isothermal titration calorimetry, NMR spectroscopy, and X-ray crystallography. Submicromolar binding affinity was observed for the peptides Phe-Lys-Gly-Gly-Tyr (FKGGY, 0.3 μM) and Tyr-Leu-Gly-Gly-Gly (YLGGG, 0.2 μM), whereas the corresponding sequence isomers Lys-Phe-Gly-Gly-Tyr (KFGGY, 0.3 nM) and Leu-Tyr-Gly-Gly-Gly (LYGGG, 1.2 nM) bound to Q8 with 1000-fold and 170-fold increases in affinity, respectively. To our knowledge, these are the highest affinities reported between a synthetic receptor and an unmodified peptide. The high-resolution crystal structures of the Q8·Tyr-Leu-Gly-Gly-Gly and Q8·Leu-Tyr-Gly-Gly-Gly complexes have enabled a detailed analysis of the structural determinants for molecular recognition. The high affinity, sequence-selectivity, minimal size of the target binding site, reversibility in the presence of a competitive guest, compatibility with aqueous media, and low toxicity of Q8 should aid in the development of applications involving low concentrations of target polypeptides.
Collapse
Affiliation(s)
- Paolo Suating
- Department of Chemistry, Trinity University 1 Trinity Place San Antonio TX 78212 USA
| | - Marc B Ewe
- Department of Chemistry, Trinity University 1 Trinity Place San Antonio TX 78212 USA
| | - Lauren B Kimberly
- Department of Chemistry, Trinity University 1 Trinity Place San Antonio TX 78212 USA
| | - Hadi D Arman
- Department of Chemistry, University of Texas at San Antonio 1 UTSA Circle San Antonio TX 78249 USA
| | - Daniel J Wherritt
- Department of Chemistry, University of Texas at San Antonio 1 UTSA Circle San Antonio TX 78249 USA
| | - Adam R Urbach
- Department of Chemistry, Trinity University 1 Trinity Place San Antonio TX 78212 USA
| |
Collapse
|
3
|
Das D, Assaf KI, Nau WM. Applications of Cucurbiturils in Medicinal Chemistry and Chemical Biology. Front Chem 2019; 7:619. [PMID: 31572710 PMCID: PMC6753627 DOI: 10.3389/fchem.2019.00619] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 08/28/2019] [Indexed: 02/02/2023] Open
Abstract
The supramolecular chemistry of cucurbit[n]urils (CBn) has been rapidly developing to encompass diverse medicinal applications, including drug formulation and delivery, controlled drug release, and sensing for bioanalytical purposes. This is made possible by their unique recognition properties and very low cytotoxicity. In this review, we summarize the host-guest complexation of biologically important molecules with CBn, and highlight their implementation in medicinal chemistry and chemical biology.
Collapse
Affiliation(s)
- Debapratim Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India
| | - Khaleel I. Assaf
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Bremen, Germany
- Department of Chemistry, Faculty of Science, Al-Balqa Applied University, Al-Salt, Jordan
| | - Werner M. Nau
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Bremen, Germany
| |
Collapse
|
4
|
Pazos E, Novo P, Peinador C, Kaifer AE, García MD. Cucurbit[8]uril (CB[8])‐Based Supramolecular Switches. Angew Chem Int Ed Engl 2018; 58:403-416. [DOI: 10.1002/anie.201806575] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Elena Pazos
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spain
| | - Paula Novo
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spain
| | - Carlos Peinador
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spain
| | - Angel E. Kaifer
- Department of Chemistry University of Miami Coral Gables FL 33124 USA
| | - Marcos D. García
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spain
| |
Collapse
|
5
|
Pazos E, Novo P, Peinador C, Kaifer AE, García MD. Supramolekulare Schalter auf der Basis von Cucurbit[8]uril (CB[8]). Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806575] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Elena Pazos
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spanien
| | - Paula Novo
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spanien
| | - Carlos Peinador
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spanien
| | - Angel E. Kaifer
- Department of Chemistry University of Miami Coral Gables FL 33124 USA
| | - Marcos D. García
- Departamento de Química Facultade de Ciencias and Centro de Investigacións Científicas Avanzadas (CICA) Universidade da Coruña 15071, A Coruña Spanien
| |
Collapse
|
6
|
Pei D, Xi XJ, Huang XY, Quan KJ, Wei JT, Wang NL, Di DL. Isolation of high-purity peptide Val-Val-Tyr-Pro from Globin Peptide using MCI gel column combined with high-speed counter-current chromatography. J Sep Sci 2018; 41:4559-4566. [PMID: 30358082 DOI: 10.1002/jssc.201800972] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/12/2018] [Accepted: 10/18/2018] [Indexed: 12/21/2022]
Abstract
Peptides have gained increased interest over the past several decades because of their therapeutics. In this research, a strategy combining MCI gel column chromatography and high-speed countercurrent chromatography was developed for the separation of high-purity peptide Val-Val-Tyr-Pro from Globin Peptide. First, the fraction of Val-Val-Tyr-Pro mixtures with a purity of 15.8% was obtained by using MCI gel column with a mixture of ethanol/water (20:80, v/v/v). Then, the high-purity Val-Val-Tyr-Pro was separated by high-speed countercurrent chromatography with a aqueous two phase systems of ethanol/acetonitrile/iso-propyl alcohol/(NH4 )2 SO4 Saturated solution /H2 O (0.5:0.5:0.25:1.5:0.7,v/v). The ammonium sulfate from high-speed countercurrent chromatography fractions was removed from target compound by MCI gel column chromatography using ethanol/water in stepwise elution mode. A 78 mg of Val-Val-Tyr-Pro was successfully purified with the purities of 98.80% from 30 g crude Globin Peptide. The amino acid sequence of the Val-Val-Tyr-Pro was determined by electrospray ionization high resolution tandem mass spectrometry. The method presents a practical strategy for the large-scale separation of pure peptide Val-Val-Tyr-Pro from Globin Peptide, and provides a reference method for obtaining high-purity peptide from other polypeptide mixtures.
Collapse
Affiliation(s)
- Dong Pei
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, P. R. China.,Center of Resource Chemical & New Material, Qingdao, Shandong, P. R. China
| | - Xing-Jun Xi
- Food and Agriculture Standardization Institute, China National Institute of Standardization, Beijing, P. R. China
| | - Xin-Yi Huang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, P. R. China
| | - Kai-Jun Quan
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, P. R. China.,University of Chinese Academy of Sciences, Beijing, P. R. China
| | - Jan-Teng Wei
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, P. R. China.,Center of Resource Chemical & New Material, Qingdao, Shandong, P. R. China
| | - Ning-Li Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, P. R. China.,Center of Resource Chemical & New Material, Qingdao, Shandong, P. R. China
| | - Duo-Long Di
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu, P. R. China
| |
Collapse
|
7
|
Williams PE, Walsh-Korb Z, Jones ST, Lan Y, Scherman OA. Stress Dissipation in Cucurbit[8]uril Ternary Complex Small Molecule Adhesives. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13104-13109. [PMID: 29965772 DOI: 10.1021/acs.langmuir.8b00894] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ability to control supramolecular and macroscopic self-assembly and disassembly holds great potential for responsive, reversible adhesives that can efficiently broker stresses accumulated between two surfaces. Here, cucurbit[8]uril is used to directly adhere two functionalized mica substrates creating surface-surface interactions that are held together through photoreversible CB[8] heteroternary complexes. Comparison of single-molecule, bulk, and macroscopic adhesion behavior give insight into cooperativity and stress dissipation in dynamic adhesive systems.
Collapse
Affiliation(s)
- Paul E Williams
- Melville Laboratory for Polymer Synthesis, Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| | - Zarah Walsh-Korb
- Melville Laboratory for Polymer Synthesis, Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| | - Samuel T Jones
- Melville Laboratory for Polymer Synthesis, Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| | - Yang Lan
- Melville Laboratory for Polymer Synthesis, Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| |
Collapse
|
8
|
Madl CM, Heilshorn SC. Bioorthogonal Strategies for Engineering Extracellular Matrices. ADVANCED FUNCTIONAL MATERIALS 2018; 28:1706046. [PMID: 31558890 PMCID: PMC6761700 DOI: 10.1002/adfm.201706046] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Hydrogels are commonly used as engineered extracellular matrix (ECM) mimics in applications ranging from tissue engineering to in vitro disease models. Ideal mechanisms used to crosslink ECM-mimicking hydrogels do not interfere with the biology of the system. However, most common hydrogel crosslinking chemistries exhibit some form of cross-reactivity. The field of bio-orthogonal chemistry has arisen to address the need for highly specific and robust reactions in biological contexts. Accordingly, bio-orthogonal crosslinking strategies have been incorporated into hydrogel design, allowing for gentle and efficient encapsulation of cells in various hydrogel materials. Furthermore, the selective nature of bio-orthogonal chemistries can permit dynamic modification of hydrogel materials in the presence of live cells and other biomolecules to alter matrix mechanical properties and biochemistry on demand. In this review, we provide an overview of bio-orthogonal strategies used to prepare cell-encapsulating hydrogels and highlight the potential applications of bio-orthogonal chemistries in the design of dynamic engineered ECMs.
Collapse
Affiliation(s)
- Christopher M Madl
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Sarah C Heilshorn
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA,
| |
Collapse
|
9
|
Wiemann M, Jonkheijm P. Stimuli-Responsive Cucurbit[n]uril-Mediated Host-Guest Complexes on Surfaces. Isr J Chem 2017. [DOI: 10.1002/ijch.201700109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Maike Wiemann
- Bioinspired Molecular Engineering Laboratory of the MIRA Institute of Biomedical Technology and Technical Medicine and the Molecular Nanofabrication Group of the MESA Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Pascal Jonkheijm
- Bioinspired Molecular Engineering Laboratory of the MIRA Institute of Biomedical Technology and Technical Medicine and the Molecular Nanofabrication Group of the MESA Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| |
Collapse
|
10
|
Appel EA, Biedermann F, Hoogland D, Del Barrio J, Driscoll MD, Hay S, Wales DJ, Scherman OA. Decoupled Associative and Dissociative Processes in Strong yet Highly Dynamic Host-Guest Complexes. J Am Chem Soc 2017; 139:12985-12993. [PMID: 28661667 DOI: 10.1021/jacs.7b04821] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Kinetics and thermodynamics in supramolecular systems are intimately linked, yet both are independently important for application in sensing assays and stimuli-responsive switching/self-healing of materials. Host-guest interactions are of particular interest in many water-based materials, sensing, and drug delivery applications. Herein we investigate the binding dynamics of a variety of electron-rich aromatic moieties forming hetero-ternary complexes with the macrocycle cucurbit[8]uril (CB[8]) and an auxiliary guest, dimethyl viologen, with high selectivity and equilibrium binding constants (Keq up to 1014 M-2). Using stopped-flow spectrofluorimetry, association rate constants were observed to approach the diffusion limit and were found to be insensitive to the structure of the guest. Conversely, the dissociation rate constants of the ternary complexes varied dramatically with the guest structure and were correlated with the thermodynamic binding selectivity. Hence differing molecular features were found to contribute to the associative and dissociative processes, mimicking naturally occurring reactions and giving rise to a decoupling of these kinetic parameters. Moreover, we demonstrate the ability to exploit these phenomena and selectively perturb the associative process with external stimuli (e.g., viscosity and pressure). Significantly, these complexes exhibit increased binding equilibria with increasing pressure, with important implications for the application of the CB[8] ternary complex for the formation of hydrogels, as these gels exhibit unprecedented pressure-insensitive rheological properties. A high degree of flexibility therefore exists in the design of host-guest systems with tunable kinetic and thermodynamic parameters for tailor-made applications across a broad range of fields.
Collapse
Affiliation(s)
- Eric A Appel
- Department of Materials Science and Engineering, Stanford University , Stanford California 94305, United States.,Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| | - Frank Biedermann
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| | - Dominique Hoogland
- Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| | - Jesús Del Barrio
- Schlumberger Gould Research Center, High Cross , Madingley Road, Cambridge CB3 0EL, U.K
| | - Max D Driscoll
- Manchester Institute of Biotechnology and School of Chemistry, University of Manchester , 131 Princess Street, Manchester M1 7DN, U.K
| | - Sam Hay
- Manchester Institute of Biotechnology and School of Chemistry, University of Manchester , 131 Princess Street, Manchester M1 7DN, U.K
| | - David J Wales
- Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| | - Oren A Scherman
- Department of Chemistry, University of Cambridge , Lensfield Road, Cambridge CB2 1EW, U.K
| |
Collapse
|
11
|
Chang Y, Zhuo Y, Chai Y, Yuan R. Host–Guest Recognition-Assisted Electrochemical Release: Its Reusable Sensing Application Based on DNA Cross Configuration-Fueled Target Cycling and Strand Displacement Reaction Amplification. Anal Chem 2017; 89:8266-8272. [DOI: 10.1021/acs.analchem.7b01272] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yuanyuan Chang
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P.R. China
| | - Ying Zhuo
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P.R. China
| | - Yaqin Chai
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P.R. China
| | - Ruo Yuan
- Key Laboratory of Luminescent
and Real-Time Analytical Chemistry (Southwest University), Ministry
of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P.R. China
| |
Collapse
|
12
|
Mikulu L, Michalicova R, Iglesias V, Yawer MA, Kaifer AE, Lubal P, Sindelar V. pH Control on the Sequential Uptake and Release of Organic Cations by Cucurbit[7]uril. Chemistry 2017; 23:2350-2355. [DOI: 10.1002/chem.201604417] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Lukas Mikulu
- Department of Chemistry; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
| | - Romana Michalicova
- Department of Chemistry; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
| | - Vivian Iglesias
- Center for Supramolecular Science and Department of Chemistry; University of Miami; Coral Gables FL 33124-0431 USA
| | - Mirza A. Yawer
- Department of Chemistry; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- RECETOX; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
| | - Angel E. Kaifer
- Center for Supramolecular Science and Department of Chemistry; University of Miami; Coral Gables FL 33124-0431 USA
| | - Premysl Lubal
- Department of Chemistry; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- Central European Institute of Technology (CEITEC); Masaryk University; Kamenice 5 625 00 Brno Czech Republic
| | - Vladimir Sindelar
- Department of Chemistry; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
- RECETOX; Masaryk University; Kamenice 5 625 00 Brno Czech Republic
| |
Collapse
|
13
|
Ren X, Wu Y, Clarke DE, Liu J, Wu G, Scherman OA. Surface-Bound Cucurbit[8]uril Catenanes on Magnetic Nanoparticles Exhibiting Molecular Recognition. Chem Asian J 2016; 11:2382-6. [DOI: 10.1002/asia.201600875] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Xiaohe Ren
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK), Fax: (+44) 01223-334866
| | - Yuchao Wu
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK), Fax: (+44) 01223-334866
| | - David E. Clarke
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK), Fax: (+44) 01223-334866
| | - Ji Liu
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK), Fax: (+44) 01223-334866
| | - Guanglu Wu
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK), Fax: (+44) 01223-334866
| | - Oren A. Scherman
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK), Fax: (+44) 01223-334866
| |
Collapse
|
14
|
Zhu L, Zhu M, Zhao Y. Controlled Movement of Cucurbiturils in Host-Guest Systems. Chempluschem 2016; 82:30-41. [DOI: 10.1002/cplu.201600309] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Liangliang Zhu
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 P. R. China
| | - Mingjie Zhu
- State Key Laboratory of Molecular Engineering of Polymers; Department of Macromolecular Science; Fudan University; 220 Handan Road Shanghai 200433 P. R. China
| | - Yanli Zhao
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link Singapore 637371 Singapore
- School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
| |
Collapse
|
15
|
Hu C, Lan Y, West KR, Scherman OA. Cucurbit[8]uril-Regulated Nanopatterning of Binary Polymer Brushes via Colloidal Templating. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:7957-62. [PMID: 26509604 PMCID: PMC4736458 DOI: 10.1002/adma.201503844] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 05/13/2015] [Indexed: 05/08/2023]
Abstract
Sub-micrometer/nanoscale patterned polymer brushes are prepared by employing cucurbit[8]uril (CB[8]) as a supramolecular recognition motif to assemble functional silica colloids onto Au surfaces as a sacrificial nanopatterning template. By employing CB[8]-mediated host-guest interactions at the interface, it is possible to readily generate nanopatterned materials in aqueous media under ambient conditions.
Collapse
Affiliation(s)
- Chi Hu
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Yang Lan
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Kevin R West
- BP Oil UK Ltd, Whitchurch Hill, Pangbourne, Reading, Berkshire, RG8 7QR, UK
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| |
Collapse
|
16
|
Liu J, Tan CSY, Lan Y, Scherman OA. Aqueous Polymer Self-Assembly Based on Cucurbit[n]uril-Mediated Host-Guest Interactions. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500295] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ji Liu
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Cambridge CB2 1EW United Kingdom
| | - Cindy Soo Yun Tan
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Cambridge CB2 1EW United Kingdom
- Faculty of Applied Sciences; Universiti Teknologi MARA; Jalan Meranek; 94300 Kota Samarahan Sarawak Malaysia
| | - Yang Lan
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Cambridge CB2 1EW United Kingdom
| | - Oren A. Scherman
- Melville Laboratory for Polymer Synthesis; Department of Chemistry; University of Cambridge; Cambridge CB2 1EW United Kingdom
| |
Collapse
|
17
|
Zheng L, Sonzini S, Ambarwati M, Rosta E, Scherman OA, Herrmann A. Turning Cucurbit[8]uril into a Supramolecular Nanoreactor for Asymmetric Catalysis. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 127:13199-13203. [PMID: 27478269 PMCID: PMC4955226 DOI: 10.1002/ange.201505628] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/10/2015] [Indexed: 11/06/2022]
Abstract
Chiral macromolecules have been widely used as synthetic pockets to mimic natural enzymes and promote asymmetric reactions. An achiral host, cucurbit[8]uril (CB[8]), was used for an asymmetric Lewis acid catalyzed Diels-Alder reaction. We achieved a remarkable increase in enantioselectivity and a large rate acceleration in the presence of the nanoreactor by using an amino acid as the chiral source. Mechanistic and computational studies revealed that both the amino acid-Cu2+ complex and the dienophile substrate are included inside the macrocyclic host cavity, suggesting that contiguity and conformational constraints are fundamental to the catalytic process and rate enhancement. These results pave the way towards new studies on asymmetric reactions catalyzed in confined achiral cavities.
Collapse
Affiliation(s)
- Lifei Zheng
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Silvia Sonzini
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK)
| | - Masyitha Ambarwati
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Edina Rosta
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB (UK)
| | - Oren A. Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK)
| | - Andreas Herrmann
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| |
Collapse
|
18
|
Zheng L, Sonzini S, Ambarwati M, Rosta E, Scherman OA, Herrmann A. Turning Cucurbit[8]uril into a Supramolecular Nanoreactor for Asymmetric Catalysis. Angew Chem Int Ed Engl 2015; 54:13007-11. [PMID: 26383272 PMCID: PMC4643185 DOI: 10.1002/anie.201505628] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/10/2015] [Indexed: 12/14/2022]
Abstract
Chiral macromolecules have been widely used as synthetic pockets to mimic natural enzymes and promote asymmetric reactions. An achiral host, cucurbit[8]uril (CB[8]), was used for an asymmetric Lewis acid catalyzed Diels–Alder reaction. We achieved a remarkable increase in enantioselectivity and a large rate acceleration in the presence of the nanoreactor by using an amino acid as the chiral source. Mechanistic and computational studies revealed that both the amino acid–Cu2+ complex and the dienophile substrate are included inside the macrocyclic host cavity, suggesting that contiguity and conformational constraints are fundamental to the catalytic process and rate enhancement. These results pave the way towards new studies on asymmetric reactions catalyzed in confined achiral cavities.
Collapse
Affiliation(s)
- Lifei Zheng
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Silvia Sonzini
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK)
| | - Masyitha Ambarwati
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Edina Rosta
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB (UK)
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK).
| | - Andreas Herrmann
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands).
| |
Collapse
|
19
|
Le Poul N, Colasson B. Electrochemically and Chemically Induced Redox Processes in Molecular Machines. ChemElectroChem 2015. [DOI: 10.1002/celc.201402399] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
20
|
Ma N, Wang WJ, Chen S, Wang XS, Wang XQ, Wang SB, Zhu JY, Cheng SX, Zhang XZ. Cucurbit[8]uril-mediated supramolecular photoswitching for self-preservation of mesoporous silica nanoparticle delivery system. Chem Commun (Camb) 2015; 51:12970-3. [DOI: 10.1039/c5cc04631a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The self peptide was introduced into the drug loaded mesoporous silica nanoparticle surface through a supramolecular photoswitchable heteroternary complexation, leading to photosensitive drug release.
Collapse
Affiliation(s)
- Ning Ma
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Wen-Jing Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Si Chen
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Xiao-Shuang Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Xiao-Qiang Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Shi-Bo Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Jing-Yi Zhu
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Si-Xue Cheng
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Xian-Zheng Zhang
- Key Laboratory of Biomedical Polymers of Ministry of Education & Department of Chemistry
- Wuhan University
- Wuhan 430072
- P. R. China
| |
Collapse
|
21
|
Hu C, Lan Y, Tian F, West KR, Scherman OA. Facile method for preparing surface-mounted cucurbit[8]uril-based rotaxanes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:10926-10932. [PMID: 25170789 DOI: 10.1021/la5026125] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Surface-immobilized rotaxanes are of practical interest for myriad applications including molecular rotors and analytical sensing. Herein, we present a facile method for the preparation of cucurbit[8]uril (CB[8])-based rotaxanes on gold (Au) surfaces threaded onto a viologen (MV(2+)) axle. The surface-bound CB[8] rotaxanes were characterized by contact angle measurements and optical microscopy. Direct imaging of the rotaxanes was accomplished by attaching either azobenzene-functionalized silica (Si-azo) colloids or fluorescein-labeled dopamine that were bound to the Au surface through a supramolecular heteroternary (1:1:1) complex with CB[8]. The surface density of CB[8] rotaxanes was examined based on their detection of dopamine. The calculated surface density is 4.8 × 10(13) molecules·cm(-2), which is only slightly lower than the theoretical value of 5.0 × 10(13) molecules·cm(-2). Surface-functionalized rotaxanes can be reversibly switched using external stimuli to bind electron-rich second guests for CB[8], including both small molecules such as dopamine and appropriately-functionalized colloidal particles. Such controlled reversibility gives rise to potential applications including selective sensing or reusable templates for preparing well-defined colloidal arrays. The formation of the surface-bound rotaxane structure is critical for successfully anchoring CB[8] host molecules onto Au substrates, yielding an interlocked architecture and preventing the dissociation of binary host-guest complex MV(2+)⊂CB[8]. The MV(2+)⊂CB[8] rotaxane structure thus effectively maintains the material density on the Au surface and dramatically enhances the stability of the functional surface.
Collapse
Affiliation(s)
- Chi Hu
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, United Kingdom
| | | | | | | | | |
Collapse
|
22
|
Cabanas-Danés J, Rodrigues ED, Landman E, van Weerd J, van Blitterswijk C, Verrips T, Huskens J, Karperien M, Jonkheijm P. A Supramolecular Host–Guest Carrier System for Growth Factors Employing VHH Fragments. J Am Chem Soc 2014; 136:12675-81. [DOI: 10.1021/ja505695w] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jordi Cabanas-Danés
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology,
Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| | | | | | - Jasper van Weerd
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology,
Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| | - Clemens van Blitterswijk
- Department
of Complex Tissue and Organ Regeneration, MERLN Institute, Maastricht University, Netherlands
| | - Theo Verrips
- Cellular
Architecture and Dynamics, Department of Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands
| | - Jurriaan Huskens
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology,
Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| | | | - Pascal Jonkheijm
- Molecular
Nanofabrication Group, MESA+ Institute for Nanotechnology,
Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
| |
Collapse
|
23
|
Yang H, Yuan B, Zhang X, Scherman OA. Supramolecular chemistry at interfaces: host-guest interactions for fabricating multifunctional biointerfaces. Acc Chem Res 2014; 47:2106-15. [PMID: 24766328 DOI: 10.1021/ar500105t] [Citation(s) in RCA: 344] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
CONSPECTUS: Host-guest chemistry can greatly improve the selectivity of biomolecule-ligand binding on account of recognition-directed interactions. In addition, functional structures and the actuation of supramolecular assemblies in molecular systems can be controlled efficiently through various host-guest chemistry. Together, these highly selective, strong yet dynamic interactions can be exploited as an alternative methodology for applications in the field of programmable and controllable engineering of supramolecular soft materials through the reversible binding between complementary components. Many processes in living systems such as biotransformation, transportation of matter, and energy transduction begin with interfacial molecular recognition, which is greatly influenced by various external stimuli at biointerfaces. Detailed investigations about the molecular recognition at interfaces can result in a better understanding of life science, and further guide us in developing new biomaterials and medicines. In order to mimic complicated molecular-recognition systems observed in nature that adapt to changes in their environment, combining host-guest chemistry and surface science is critical for fabricating the next generation of multifunctional biointerfaces with efficient stimuli-responsiveness and good biocompatibility. In this Account, we will summarize some recent progress on multifunctional stimuli-responsive biointerfaces and biosurfaces fabricated by cyclodextrin- or cucurbituril-based host-guest chemistry and highlight their potential applications including drug delivery, bioelectrocatalysis, and reversible adsorption and resistance of peptides, proteins, and cells. In addition, these biointerfaces and biosurfaces demonstrate efficient response toward various external stimuli, such as UV light, pH, redox chemistry, and competitive guests. All of these external stimuli can aid in mimicking the biological stimuli evident in complex biological environments. We begin by reviewing the current state of stimuli-responsive supramolecular assemblies formed by host-guest interactions, discussing how to transfer host-guest chemistry from solution onto surfaces required for fabricating multifunctional biosurfaces and biointerfaces. Then, we present different stimuli-responsive biosurfaces and biointerfaces, which have been prepared through a combination of cyclodextrin- or cucurbituril-based host-guest chemistry and various surface technologies such as self-assembled monolayers or layer-by-layer assembly. Moreover, we discuss the applications of these biointerfaces and biosurfaces in the fields of drug release, reversible adsorption and release of some organic molecules, peptides, proteins, and cells, and photoswitchable bioelectrocatalysis. In addition, we summarize the merits and current limitations of these methods for fabricating multifunctional stimuli-responsive biointerfaces in a dynamic noncovalent manner. Finally, we present possible strategies for future designs of stimuli-responsive multifunctional biointerfaces and biosurfaces by combining host-guest chemistry with surface science, which will lead to further critical development of supramolecular chemistry at interfaces.
Collapse
Affiliation(s)
- Hui Yang
- The Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Bin Yuan
- The Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Xi Zhang
- The Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Oren A. Scherman
- Melville Laboratory for Polymer
Synthesis, Department of Chemistry, University of Cambridge, Cambridge CB21EW, United Kingdom
| |
Collapse
|
24
|
Advances in contact printing technologies of carbohydrate, peptide and protein arrays. Curr Opin Chem Biol 2014; 18:1-7. [DOI: 10.1016/j.cbpa.2013.10.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 09/26/2013] [Accepted: 10/01/2013] [Indexed: 12/15/2022]
|
25
|
Voskuhl J, Sankaran S, Jonkheijm P. Optical control over bioactive ligands at supramolecular surfaces. Chem Commun (Camb) 2014; 50:15144-7. [DOI: 10.1039/c4cc03184a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Addressing whole protein and bacterial immobilization and their optical control on a β-cyclodextrin supramolecular platform.
Collapse
Affiliation(s)
- J. Voskuhl
- Laboratory Group Bioinspired Molecular Engineering
- MESA+ Institute for Nanotechnology
- Department of Science and Technology
- University of Twente
- , The Netherlands
| | - S. Sankaran
- Laboratory Group Bioinspired Molecular Engineering
- MESA+ Institute for Nanotechnology
- Department of Science and Technology
- University of Twente
- , The Netherlands
| | - P. Jonkheijm
- Laboratory Group Bioinspired Molecular Engineering
- MESA+ Institute for Nanotechnology
- Department of Science and Technology
- University of Twente
- , The Netherlands
| |
Collapse
|
26
|
Ali OA, Olson EM, Urbach AR. Effects of sequence context on the binding of tryptophan-containing peptides by the cucurbit[8]uril–methyl viologen complex. Supramol Chem 2013. [DOI: 10.1080/10610278.2013.810338] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Omar A. Ali
- Department of Chemistry, Trinity University, San Antonio, TX78212, USA
| | - Eric M. Olson
- Department of Chemistry, Trinity University, San Antonio, TX78212, USA
| | - Adam R. Urbach
- Department of Chemistry, Trinity University, San Antonio, TX78212, USA
| |
Collapse
|
27
|
Buaki-Sogo M, Montes-Navajas P, Alvaro M, Garcia H. Host-guest complexes between cucurbit[n]urils and acetanilides having aminopropyl units. J Colloid Interface Sci 2013; 399:54-61. [PMID: 23541695 DOI: 10.1016/j.jcis.2013.02.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Accepted: 02/13/2013] [Indexed: 10/27/2022]
Abstract
2-(Propylamino)acetamide of aniline (1a), and bis-2-(propylamino)acetamide of ortho- (1b) and para-(1c) phenylenediamine form host-guest complexes with CB[6], CB[7] and CB[8] as evidenced by the variations in the (1)H NMR spectroscopy chemical shifts and observation in MALDI-TOF-MS and ESI-MS of ions at the corresponding mass. Binding constants for the 1:1 complexes were estimated from fluorescence titrations and were in the range 10(5)-10(6)M(-1). Models based on molecular mechanics for these supramolecular complexes are provided. In spite of the different geometries arising from the ortho- or para-substitution, phenylenediamides form complexes of similar strength in which the hydrophobic alkyl chains are accommodated inside the host cavity. Formation of these host-guest complexes in the solid state was also achieved by modifying an aminopropyl silica with chloroacetanilides and preparing three silica having analogues of compounds 1a-c anchored to the solid particles. Titrations showed, however, that these solids can adsorb a large percentage of CBs by unselective interactions that are not related to the formation of inclusion complexes.
Collapse
Affiliation(s)
- Mireia Buaki-Sogo
- Instituto de Tecnología Química CSIC-UPV and Departamento de Química, Universidad Politécnica de Valencia, Valencia, Spain
| | | | | | | |
Collapse
|
28
|
González-Campo A, Brasch M, Uhlenheuer DA, Gómez-Casado A, Yang L, Brunsveld L, Huskens J, Jonkheijm P. Supramolecularly oriented immobilization of proteins using cucurbit[8]uril. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:16364-16371. [PMID: 23134267 DOI: 10.1021/la303987c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A supramolecular strategy is used for oriented positioning of proteins on surfaces. A viologen-based guest molecule is attached to the surface, while a naphthol guest moiety is chemoselectively ligated to a yellow fluorescent protein. Cucurbit[8]uril (CB[8]) is used to link the proteins onto surfaces through specific charge-transfer interactions between naphthol and viologen inside the CB cavity. The assembly process is characterized using fluorescence and atomic force microscopy, surface plasmon resonance, IR-reflective absorption, and X-ray photoelectron spectroscopy measurements. Two different immobilization routes are followed to form patterns of the protein ternary complexes on the surfaces. Each immobilization route consists of three steps: (i) attaching the viologen to the glass using microcontact chemistry, (ii) blocking, and (iii) either incubation or microcontact printing of CB[8] and naphthol guests. In both cases uniform and stable fluorescent patterns are fabricated with a high signal-to-noise ratio. Control experiments confirm that CB[8] serves as a selective linking unit to form stable and homogeneous ternary surface-bound complexes as envisioned. The attachment of the yellow fluorescent protein complexes is shown to be reversible and reusable for assembly as studied using fluorescence microscopy.
Collapse
Affiliation(s)
- Arántzazu González-Campo
- Molecular Nanofabrication Group, Department of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Tian F, Jiao D, Biedermann F, Scherman OA. Orthogonal switching of a single supramolecular complex. Nat Commun 2012; 3:1207. [DOI: 10.1038/ncomms2198] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 10/10/2012] [Indexed: 12/22/2022] Open
|
30
|
An Q, Brinkmann J, Huskens J, Krabbenborg S, de Boer J, Jonkheijm P. A Supramolecular System for the Electrochemically Controlled Release of Cells. Angew Chem Int Ed Engl 2012; 51:12233-7. [DOI: 10.1002/anie.201205651] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Indexed: 12/22/2022]
|
31
|
An Q, Brinkmann J, Huskens J, Krabbenborg S, de Boer J, Jonkheijm P. A Supramolecular System for the Electrochemically Controlled Release of Cells. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205651] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
32
|
Zhang J, Liu Y, Yuan B, Wang Z, Schönhoff M, Zhang X. Multilayer Films with Nanocontainers: Redox-Controlled Reversible Encapsulation of Guest Molecules. Chemistry 2012; 18:14968-73. [DOI: 10.1002/chem.201202978] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Indexed: 11/12/2022]
|
33
|
Cziferszky M, Biedermann F, Kalberer M, Scherman OA. Probing the stability of multicomponent self-assembled architectures based on cucurbit[8]uril in the gas phase. Org Biomol Chem 2012; 10:2447-52. [DOI: 10.1039/c2ob06954g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
34
|
Masson E, Ling X, Joseph R, Kyeremeh-Mensah L, Lu X. Cucurbituril chemistry: a tale of supramolecular success. RSC Adv 2012. [DOI: 10.1039/c1ra00768h] [Citation(s) in RCA: 768] [Impact Index Per Article: 64.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
|
35
|
|
36
|
Das D, Scherman OA. Cucurbituril: At the Interface of Small Molecule Host-Guest Chemistry and Dynamic Aggregates. Isr J Chem 2011. [DOI: 10.1002/ijch.201100045] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
37
|
Urbach AR, Ramalingam V. Molecular Recognition of Amino Acids, Peptides, and Proteins by Cucurbit[n]uril Receptors. Isr J Chem 2011. [DOI: 10.1002/ijch.201100035] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
38
|
Chinai JM, Taylor AB, Ryno LM, Hargreaves ND, Morris CA, Hart PJ, Urbach AR. Molecular recognition of insulin by a synthetic receptor. J Am Chem Soc 2011; 133:8810-3. [PMID: 21473587 DOI: 10.1021/ja201581x] [Citation(s) in RCA: 245] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The discovery of molecules that bind tightly and selectively to desired proteins continues to drive innovation at the interface of chemistry and biology. This paper describes the binding of human insulin by the synthetic receptor cucurbit[7]uril (Q7) in vitro. Isothermal titration calorimetry and fluorescence spectroscopy experiments show that Q7 binds to insulin with an equilibrium association constant of 1.5 × 10(6) M(-1) and with 50-100-fold selectivity versus proteins that are much larger but lack an N-terminal aromatic residue, and with >1000-fold selectivity versus an insulin variant lacking the N-terminal phenylalanine (Phe) residue. The crystal structure of the Q7·insulin complex shows that binding occurs at the N-terminal Phe residue and that the N-terminus unfolds to enable binding. These findings suggest that site-selective recognition is based on the properties inherent to a protein terminus, including the unique chemical epitope presented by the terminal residue and the greater freedom of the terminus to unfold, like the end of a ball of string, to accommodate binding. Insulin recognition was predicted accurately from studies on short peptides and exemplifies an approach to protein recognition by targeting the terminus.
Collapse
Affiliation(s)
- Jordan M Chinai
- Department of Chemistry, Trinity University, One Trinity Place, San Antonio, Texas 78212, USA
| | | | | | | | | | | | | |
Collapse
|